Patent EP0425269A2 successfully refreshed from Google Patents.
EP0425269A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Superabsorbent polymer fibers and processes for their production
Assignee: CNA Holdings LLC
•
Filing: 1990-10-24
•
Granted: —
•
Expires: 2010-10-24
Abstract
Abstract This invention discloses the melt spun fiber blend of a conventional synthetic material and a superabsorbent polymer and a process for its production. In a preferred process the materials are comprised of blends selected from the group consisting of polyethylene, polypropylene, copolymers of a polyethylene, vinyl acetate, and cellulose acetates blended with a superabsorbent polymer. These fibers can be quite useful in wound dressings, athletic clothing, and other such uses where high water absorbance of a fiber is important.
Inventors
- 👤 Dai W. Kim
- 👤 Joseph J. Dibiase
- 👤 Joseph Pickton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:37
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61L15/42; A61L15/60; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/10; D; D01; D01F; D01F6/00; D01F6/88; C08L2203/00; C08L2203/12; C08L2312/00; C08L33/00; C08L33/02; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) forming a blend of a synthetic material and superabsorbent polymer particulates; and (b) melt spinning that blend to form the synthetic fibers containing a superabsorbent polymer.
Claim 2
Dependent Claim
39 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) forming a blend of a synthetic material and superabsorbent polymer particulates; and (b) melt spinning that blend to form the synthetic fibers containing a superabsorbent polymer.
Claim 3
Dependent Claim
17 words
The process of Claim 1 wherein the melting point of the synthetic material is less than 250°C.
Claim 4
Dependent Claim
23 words
The process of Claim 1 or 2 wherein the synthetic material is selected from polyamides, polyesters, polyolefins, polyvinylidene chloride copolymers, and cellulose acetates.
Claim 5
Dependent Claim
15 words
The process of Claim 3 wherein the synthetic material is a polyethylene or a polypropylene.
Claim 6
Dependent Claim
20 words
The process of any of Claims 1-3 wherein the synthetic material is a combination of two or more synthetic polymers.
Claim 7
Dependent Claim
16 words
The process of Claim 5 wherein the synthetic material is a polypropylene, ethylene vinyl acetate copolymer.
Claim 8
Dependent Claim
24 words
The process of any of Claims 1-6 wherein the concentration of the superabsorbent polymer in the blend is from 1% to 30% by weight.
Claim 9
Dependent Claim
22 words
The process of Claim 7 wherein the concentration of the superabsorbent polymer in the blend is from 5% to 20% by weight.
Claim 10
Dependent Claim
20 words
The process of any of Claims 1-8 wherein the size of the superabsorbent polymer particulates is less than 5 microns.
Claim 11
Dependent Claim
19 words
The process of any of Claims 1-9 wherein the melt spinning is conducted at a temperature up to 250°C.
Claim 12
Dependent Claim
31 words
The process of any of Claims 1-10 such that the fibers absorb water in an amount at least 15 percent of the weight of the superabsorbent polymer contained within the fibers.
Claim 13
Dependent Claim
72 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) preparing ground synthetic material particulates wherein the particulates are less than 50 microns and wherein the synthetic material is selected from polyamides, polyesters, polyolefins, polyvinylidene chloride copolymers, and cellulose acetates; (b) blending with that synthetic material superabsorbent polymer particulates; and (c) melt spinning that blend at a temperature less than 250°C to form synthetic fibers containing a superabsorbent polymer.
Claim 14
Dependent Claim
72 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) preparing ground synthetic material particulates wherein the particulates are less than 50 microns and wherein the synthetic material is selected from polyamides, polyesters, polyolefins, polyvinylidene chloride copolymers, and cellulose acetates; (b) blending with that synthetic material superabsorbent polymer particulates; and (c) melt spinning that blend at a temperature less than 250°C to form synthetic fibers containing a superabsorbent polymer.
Claim 15
Dependent Claim
65 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) preparing ground polyethylene particulates wherein the particulate size is less than 50 microns; (b) blending with those ground polyethylene particulates superabsorbent polymer particulates comprising graft copolymers of acrylic acid and oxidized starch; and (c) melt spinning that blend at a temperature less than 250°C to form polyethylene fibers containing a superabsorbent polymer.
Claim 16
Dependent Claim
65 words
A process for the production of fibers containing a superabsorbent polymer comprising: (a) preparing ground polyethylene particulates wherein the particulate size is less than 50 microns; (b) blending with those ground polyethylene particulates superabsorbent polymer particulates comprising graft copolymers of acrylic acid and oxidized starch; and (c) melt spinning that blend at a temperature less than 250°C to form polyethylene fibers containing a superabsorbent polymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.